What are Vault Cards and Diamond Keys, you ask? We've got you covered with this quick guide. Each Vault Card offers unique Legendary gear, tons of new cosmetic items, and an all-new in-game resource: Diamond Keys. In addition to a new raid boss, extra story missions, and behind-the-scenes footage, the Director's Cut also includes three Vault Cards: a new progression system with endless rewards. The Director's Cut add-on for Borderlands 3 brings all new ways to play. Everything you need to know about the Vault Cards and Diamond Keys included in the Director's Cut add-on for Borderlands 3 !